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    <h1>NLP Interchange Format (NIF) 2.0 - Overview and Documentation</h1>
    

<p>The NLP Interchange Format (NIF) is an RDF/OWL-based format that aims to achieve interoperability between Natural Language Processing (NLP) tools, language resources and annotations. NIF consists of specifications, ontologies and software (<a href="http://persistence.uni-leipzig.org/nlp2rdf">overview</a>), which are combined under the version identifier "NIF 2.0", but are <a href="http://persistence.uni-leipzig.org/nlp2rdf/specification/version.html">versioned individually</a>.</p>

<p>This document contains pointers to all the important resources relevant for the NLP Interchange Format (NIF), Version 2.0. 
Although the road to complete interoperability is still long, NIF is already successful in providing best practices and a solid foundation for the most frequent use cases. 

This foundation is created by:
<ul>
<li><strong>Reusing existing standards</strong> such as  
	<a href="http://www.w3.org/TR/rdf-primer/"target="_blank" >RDF</a>, 
	<a href="http://www.w3.org/TR/owl2-overview/"target="_blank" >OWL 2</a>, 
	<a href="http://www.w3.org/TR/prov-o/" target="_blank" >the PROV Ontology</a>, 
	<a href="http://www.cs.vassar.edu/~ide/papers/ISO+24612-2012.pdf" target="_blank" >LAF (ISO 24612)</a>
	and <a href="http://tools.ietf.org/html/rfc5147">RFC 5147</a></li>
<li>Furthermore, NIF identifiers are used in the <a href="http://www.w3.org/TR/its20/" target="_blank" >Internationalization Tag Set (ITS) Version 2.0</a></li>
<li>All parts of NIF are <strong>royality-free</strong> and are published under an <strong>open license</strong>.</li>
<li>NIF comprises a set of RDF vocabularies and ontologies, which have <strong>stable identifiers</strong>, <strong>persistent hosting</strong>, an <strong>open license</strong> and a <strong>community approved meaning</strong>.</li>
<li>NIF publishes and maintains a set of <strong>specifications</strong> (NIF 2.0 Core Spec<!--a href="http://persistence.uni-leipzig.org/nlp2rdf/specification/core.html" >NIF 2.0 Core</a-->, <a href="http://persistence.uni-leipzig.org/nlp2rdf/specification/api.html" >Public Api Spec</a>, <a href="http://persistence.uni-leipzig.org/nlp2rdf/specification/version.html" >Version Information</a> ) with best practices, complementary implementations and examples on how to use the ontologies.</li>
<li>NIF is driven by its open and weclome-to-join community project NLP2RDF, consisting of a <a href="http://lists.informatik.uni-leipzig.de/mailman/listinfo/nlp2rdf" target="_blank">mailing list</a>, a <a href="https://github.com/NLP2RDF" target="_blank">GitHub Project</a> and a <a href="http://nlp2rdf.org" target="_blank">blog web site</a> </li>
<li>NIF has received good uptake by industry, open-source projects and developers.  We would like to thank all contributors in the <a href="#attribution">attribution section</a> </li>
</ul>
</p>

<h2>News</h2>
<ul>
<li><b>September 6th, 2013</b>: Added resource list below.</li>
<li><b>July 7th, 2013</b>: <a href="specification/api.html" >Initial draft of API parameters published.</a></li>
<li><b>July 7th, 2013</b>: <a href="specification/version.html" >Initial draft of Versioning and License specifications published.</a></li>
<li><b>May 17, 2013</b>: <a href="http://svn.aksw.org/papers/2013/ISWC_NIF/public.pdf" target="_blank">Integrating NLP using Linked Data</a>. Sebastian Hellmann, Jens Lehmann, Sören Auer, and Martin Brümmer. accepted at ISWC 2013</li>

</ul>

<hr />

<h1>About</h1>
<h3>What is NIF 2.0?</h3>
<p>
NIF 2.0 is a set of resources which constitute a major, not backward-compatible improvement upon the previous version NIF 1.0.
Since NIF 2.0 is very diverse and it consists of specifications, ontologies, implementations and corpora. 
NIF is maintained by the <a href="http://nlp2rdf.org">NLP2RDF community project</a>
If you are interested in NLP2RDF, you can write emails to the <a href="http://lists.informatik.uni-leipzig.de/mailman/listinfo/nlp2rdf">nlp2rdf discussion list</a> or sign up directly below:<form method="post" action="http://lists.informatik.uni-leipzig.de/mailman/subscribe/nlp2rdf"> 
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	<tr><td>E-mail address:</td><td><input type="text" name="email" size="28" value=""></td></tr>
	<tr><td>Name:</td><td><input type="text" name="fullname" size="28" value="">&nbsp;<input type="submit" name="email-button" value="Subscribe"></td></tr>
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</p>

<h2>How to attribute NIF?</h2>
We try to maintain an up-to-date page with <a href="http://nlp2rdf.org/acknowledgements">acknowledgements</a> to the large community of contributors.

If you refer to NIF in an academic context, please cite the recent paper published at the ISWC in Use track 2013:
<ul>
	<li><a href="http://svn.aksw.org/papers/2013/ISWC_NIF/public.pdf" target="_blank">Integrating NLP using Linked Data</a>. Sebastian Hellmann, Jens Lehmann, Sören Auer, and Martin Brümmer. 12th International Semantic Web Conference, 21-25 October 2013, Sydney, Australia, (2013)</li>
</ul>
There is also a list of further <a href="http://nlp2rdf.org/publications">NIF-related scientific publications</a>.


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<!--h3>Old infrastructure and specs - where have they been moved? </h3>
<ul>
	<li><a href="http://nlp2rdf.org/nif-1-0" target="_blank" >NIF Version 1.0</a> remains where it is (for historical reasons)</li>
	<li><a href="http://nlp2rdf.org/nif-2-0-draft" target="_blank" >Changelog</a> remains where it is (for historical reasons)</li>
	<li><a href="http://code.google.com/p/nlp2rdf" target="_blank" >Google code</a> still has some code, that has not been moved to GitHub, yet.</li>
	<li>Ontologies at http://nlp2rdf.lod2.eu/schema have been moved to GitHub</li>
	<li>Wiki at http://wiki.nlp2rdf.org has been merged into GitHub</li>
</ul-->


<!--p>Since NIF aims to cover the whole domain of NLP, it is obvious that this progress will require several years and a joint community effort. 
</p-->


<h1>Resource List</h1>
<p>This part is automatically generated using JavaScript on the basis of <a href="https://github.com/NLP2RDF/ontologies/blob/master/dev/misc/resources.ttl">https://github.com/NLP2RDF/ontologies/blob/master/dev/misc/resources.ttl</a>.</p>


<div id="NIF_resources" style="padding:15px 415px 15px 15px;">

<h2>Historic</h2>

<h4>NIF 1.0 Specification</h4>
A document specifying the deprecated NIF 1.0 specification. During NIF 1.0, we did not track revisions or versions. The old specification can be found here: <a href="http://nlp2rdf.org/nif-1-0">http://nlp2rdf.org/nif-1-0</a>


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